cis-Ru(bpy)2Cl2 (bpy = 2,2'-bipyridine) reacted with H4PQQ (I) to give Ru(bpy)2(H2PQQ) (II). II was reversibly electrochem. reduced to the semiquinone complex and subsequently to the catechol complex. The results along with ESR and absorption spectral data are compared with those for [Ru(bpy)2L]2+ (L = 4,7-phenonthroline-5,6-dione, 9,10-phenanthrenequinone) whose 1st redn. step is irreversible. At pH 8.5 H2PQQ2- in II is deprotonated to PQQ4-. [on SciFinder(R)]
%0 Journal Article
%1 Schwederski.1990
%A Schwederski, Brigitte
%A Kasack, Volker
%A Kaim, Wolfgang
%A Roth, Eberhard
%A Jordanov, Jeanne.
%D 1990
%J Angewandte Chemie
%K bipyridine complex complex;electroredn complex;redn deprotonation electrochem methoxatine ruthenium
%N 1
%P 74--76
%T Ambident behavior of the new vitamin methoxatine (cofactor PQQ) toward metals. Coordinative stabilization of pyrrolide and semiquinone forms
%V 102
%X cis-Ru(bpy)2Cl2 (bpy = 2,2'-bipyridine) reacted with H4PQQ (I) to give Ru(bpy)2(H2PQQ) (II). II was reversibly electrochem. reduced to the semiquinone complex and subsequently to the catechol complex. The results along with ESR and absorption spectral data are compared with those for [Ru(bpy)2L]2+ (L = 4,7-phenonthroline-5,6-dione, 9,10-phenanthrenequinone) whose 1st redn. step is irreversible. At pH 8.5 H2PQQ2- in II is deprotonated to PQQ4-. [on SciFinder(R)]
@article{Schwederski.1990,
abstract = {cis-Ru(bpy)2Cl2 (bpy = 2,2'-bipyridine) reacted with H4PQQ (I) to give Ru(bpy)2(H2PQQ) (II). II was reversibly electrochem. reduced to the semiquinone complex and subsequently to the catechol complex. The results along with ESR and absorption spectral data are compared with those for [Ru(bpy)2L]2+ (L = 4,7-phenonthroline-5,6-dione, 9,10-phenanthrenequinone) whose 1st redn. step is irreversible. At pH 8.5 H2PQQ2- in II is deprotonated to PQQ4-. [on SciFinder(R)]},
added-at = {2022-06-15T11:26:56.000+0200},
author = {Schwederski, Brigitte and Kasack, Volker and Kaim, Wolfgang and Roth, Eberhard and Jordanov, Jeanne.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2229b3b86d2cbdd977c16035e8198ef3e/huebleriac},
interhash = {a2de9c69dc4c58b01b2cc9bcd79cf8db},
intrahash = {229b3b86d2cbdd977c16035e8198ef3e},
issn = {0044-8249},
journal = {Angewandte Chemie},
keywords = {bipyridine complex complex;electroredn complex;redn deprotonation electrochem methoxatine ruthenium},
number = 1,
pages = {74--76},
timestamp = {2022-06-15T09:26:56.000+0200},
title = {Ambident behavior of the new vitamin methoxatine (cofactor PQQ) toward metals. Coordinative stabilization of pyrrolide and semiquinone forms},
volume = 102,
year = 1990
}
